Heat-exchange cylinder



June 5, 1928. 1,672,036

J. w. OLTMAN HEAT EXCHANGE CYLI NDER Filed Jan. 17, 1925 l-ll mmm?

@51g V3 @Hoff/140% jl. Q/

Patented June 5, 1928.

UNITED STATES .PATENT OFFICE.

J'HLN W. OLTMAN, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 THE BARRETT COMPANY, A

CORPOATION F NEW JERSEY.

HEAT-EXCHANGE CYLINDER.

Application led January This invention relates to a coolin or heating drum. It relates more particu arly to a drum for drying materials such as asheet of felt roofing, for exam' le. ,.Heretofore in.

6 devices of this sort it as 'been necessary when high temperatures were desired towintroduce a heating iluid such as steam, for exam le, the esired temperature. In such cases troubles havearisen beca-use of the diiculty of providing steam-tight joints where the inlet;l pipes were connected to revolving parts.

By the y the device for containing vthe hot liluids' under pressure is kept stationary thuslobviating the difficulties that occur Vbecause of leakage between .stationary and movin l parts, and the portion that revolvesl is place 2o in proximityto the heated stationary partV with a heat conducting liquid such'as oil,

asphalt, pitch or the like therebetween.

Mercuryehas beenP found-,to bethe most def sirable liquid for this purpose on account of its high heat conductivity, highv boiling point, low freezing point, and resistance to change at elevated temperatures. l

The invention will 'be understood from the description in connection with the accom'- panying drawings in which.:

Fig. 1 is a side view ofth `-device partly in section; and

Fig. 2 is a similar view broken` away showing a modification.

In t-he drawings reference character lyin- `dicates a hollow stationary cylinder which has two hollow extensions 2 and 3 that serve to keep the cylinder l in place. These ex' tensions are rigidly mounted in supportsv .and inlet pipe 5 and outlet pipe 6 are con'- nected' tothe extensions 2 and 3. A chan nel 7 in the end wall of the cylinder -1 leads from the cylindrical surface of the cylinder 1 to the longitudinal channel 8 in extensionv 3 which, in turn, is connected to a pipe 9' Y the highly heated or high pressure fluid is Y leading to an overllowtank 1G.

The outerrevoluble cylinder 11 'is pro# vided with bearings 12 andy13 which `are` journaled in the` supports 14 and 15. -The cylinder 11 is provided with a driving gear 16 for revolving the sameor it` may be re"-Y volved in any other convenient manner.l Glands or stuliing'lioxes 1 7 retain thev packling material 18- between the extensions 2 'and 3 andi-fthe portieri.v of the cylinder-- 51,1

at high pressure in order to obtainl resent invention thev portion of v'17, i925. serial No. 2,981.

therearound thus preventing -leakage along the outside of the extensions 2 and 3..

In the modification illustrated in Fig. 2 the parts are all the samef.except'that'the spiral .pipe 1 is used in lieu of. the hollow an Acylinder 1. It is obyious that the extensions 2 and 3 may terminate in headers with one ormorecircular series of pipes joining the headers inside 'of the cylinder 11. The space between the cylinder l (or the-pipe 1) .65

Y' and the cylinder 11 is lled with the appropriate liquid.

The o eration is Las follows: A heating fluid suc as steam under high pressure, for example, is introduced through the pipe 5 70 into the inside of the stationa cylinder 1 and after heating the same t is material passes out through the' extension 3 and pipe 6. The cylinderv 11 is set in motion and the heat is .transmitted to this cylinder through the liquid .(preferably'mer'cury) located between the two cylinders. It the entire space between' the two'cylinders is filled with the liquid, the liquid will stand ata certain height in thev ipe. 9 and in case the same is so expanded by eating, the excess liquid will be driven -through the channels 7 and 8 and pipe 9 into the tank 10. The material such as a ,sheetof felt roofing, for example, that.y

is to be dried is brought into contact with 35.

:the outside surface of the cylinder 11.and

becomes dried' as it passes'thereover. In casethe material to be dried or heated comes" into contact only with the lowerside of the cylinder 11, the liquid between. the two cylinders 1 and 11 does not have-to fill the en- Atire space between the two, but can merely p introduced can readily be made of requisite strength to stand the operating, conditions;

' In case it` is desiredto use the drum for cooling instead of lheating purposes, la cool L05 ing fluid in lieu of aheatingffluid is passed through thev pipe 5.

- 1.111 a 'deviceof the character described,

stationary heater inside and in close proximity to said cylinder, means for introduc ing ahot fluid into said heater and a liquid a revoluble cylinder,

interposed between said cylinder and heater. 2. In a device of the character described, a revoluble cylinder, a cylindrical shaped Stationary heater inside and' in close prox- 'unity to said c linder, a liquid interposed between said cy inder and heater and means to permit said liquid to expand and contract while so interposed.

3. In a device of the character described,

aV stationary heater inside said cylinder, supports for said heater and a vent through vone of said supports communicatin with the space between said cylinder and ing'with an overflow chamber for heat transmittmg fluid which may be introducedA into .the space between said heater land-cylinder. y 4. In a device of the character described,

eater, Vsaid vent cominunicat cylinder andv element.

va revoluble c linder, a stationary cylinder of revolubly mounted upon said extensions, and

means Ywithin one lof said extensions for in- `troducing a, heating fluid into saidstationary cylinder and a heat transmitting fluid into the space between saidV cylinders.

f 5. In a device of the characterdescribed a revoluble-,cylindera cylindrical' shape 'stationary element inside and in close proximity to said cylinder, and mea-ns for introducing a. fluid` into said element and means for housing ail'uid in the space between said l In testimony whereof I ailix mysignatu're. i

JOHNV W. OLTMAN. 

